Loom shuttle



Aug. 27, 1935. c. D. BROWN LOOM SHUTTLE Filed Jan. 22, 1955 INVENTOR.

CAEL D. Bean N.

BY I

w/ T/VEJS.

ATTORNEY.

Patented Aug, 2 193 5 UNITED- T -ms can D. Brpwn, "Hopedale,c MassuQassignor to f t;

Draper Corporation; Hopedale', Mass; at corpoe v ration of -Maine Application g ime; 925, set :41. e 2,92

- {10 'olaiai (01; 139-5233) i The present invention pertainsto automatically threading loom shuttles and has morelpali-f ticular reference to the iillingtensi'oning or con: trolling means of such shuttles; v k 1 vShuttles of the type tojwhich my. invention pere tains are employed in automatic bobbin .chang ing looms, wherein the filling supply'in the shuttle is automatically replenishedbytransferring a new fillingcarrier, such as abobbin; to-the l0 shuttle when required; The shuttles are-pro; vided with a threading blockwhereby thef lling becomes partially threaded pin -the shuttle at ;the

beginning of the firstpick ;af ter trans fer and fully threaded at the beginning of th'e second 5: pick after transfer. Thus, the runningfilling,

when partially threaded, occupies a given .pathin the shuttle and thre n block nd occu i s? relatively different path therein when fully threaded. The path" of the; pa t ally thread d fi n n a ly strai ht; .wlr i e the. pat fully threaded filling is more tortuous, withl h result that less tension is placed onthe filling during the first pick after transferthan din";ing subsequent picks. I s e 3, The placing of adifferenttensidnonthefilling during the first pick af ter transferthan during subsequent picks will cause-a vsuostanl'lial detect in the appearance of cloth wo ven with artificial silk filling such -as ;rayon;, It has-been thought that in order to prevent suchIdQfBCts-itwasonly necessaryto add to the shuttle a tension device whichis. capable of becoming ,efieotive early in the first pick aftertransfer. Experience has shown that such devices rnay prevent-a slack first-pick, but, since their tension is added-to the; tension placed on the ,fully threaded; filling,

all'subs'equent picks will be placed-und r too nuch tension, and thus they may cause more de fects thantheycure. I propose to overcome the "aforementioned defects by.providing,inwan automatically threading loom shuttle, atension device ,whichds c a pable ofyengaging and tensioning;the-running fill g only duringsuchtime asthe vfilling may be atiallythreacled,rthe rdevicegrelfififi n 1 1 6l l iitfi the latter becomesiullythreaded; ;I;find hat it is .not enou h lmer lyct apply, ri tio 0 t e filling while: the shuttle visjn flight; -but q ab e 10 venting a slackening-(oft ling-dun interval ;after-;the shuttle is hoxed a't the end of the first: pick after transfer ndpetore the filling beaten intozthewcleth ordingly, present; iX'IVBIltiQl'lgHIIOVl a tensiondevicewh eh is. comprised ofirelatim lmqvalql cmmb 5?:

vclaims.

tionis illustratedon the accgmpanyingidrawing,

.rfi Pen avian vi wq t a longitud i pable of frictioningt.qr grippingthe mun 'suffi ciently' to preventgthe slackening of the filling as aioresaidr c 5 11 he preferred embodiment of my inventiqn herein i l'Q di t el ided With a againstlthe 'thread guard, the :size and localli'Qn 5: v

releaseof'the fillingas the latter passesifrgn of .theplunger being suchcas toresult the its partially threaded to its fully. threaded pgsition. "Such embodiment is .disqlqsedj by vsgay of illustration only, asit willjhe apparent t at the a resultsaccomplished by the same may otheri wise. attained within'the' scope of'the app ded T e sa ref r embo me Of. e nt en:

f wh ch .v -cc "F g 1b is .a..-p.er pective v ew fi th? \eye end of th tt w th t fill n fu l t r adedv t er i rial? 'ccros s qt al. view tek n apmiqximately on in'e2j-t-2 ofjjjig fhhutjwiththefilling J Fi .3 Qr s' -.,s.e io. iQ taken. M1 2 0? imately on 'line 3- -3 of Fig.'j1;;and 1 't eirwith; thefil in part al thr aded, 1 The shuttle on the drawing fshuttlebody' l having a cavity 2 wherein is re;-

scei d" :filli et rierashobbi fif Suitfahl .ve 1 means, not' shown, are rovided r ho d he'ib bbinJwqQh-ma nfl' a 1 an be. aut ticall realm... st ei r bob hen th ffi a supp .fh qems i P t $l h f ;t1e bod rec s to ecei ,athrsiad he'fb k iwhi h t ron and rear we l 5 and? d9 n l ex ndin hr a s ag ,which s a allya'li gnedl wit uam D ej ct andrearwardly tr ngthe joper ationflof the loon'ilnotj S a n); when 'arloob in is'firsttransferrjrzd to th shuttle t e filling 'j extendsf train the ,bobhin mama naliy putwardlvpf the ,shfittlelabovefihe. threadmg block not hown).

transfer and a relatively different path during, receiving the fully threaded filling, said patlibesubsequent picks, and a spring clamp tension device positioned in the first saidpath only and engaging and tensioning the running filling only throughout substantially the whole of said first pick after transfer.

' 4. .An automatically threading loom having threading delivery means wherein the running filling becomes partially threaded during the first pick after transfer and fully threaded duringthe next succeeding pick,-said shuttle having a. first pick tension device comprised of a spring clamp tension engaging and tensioning the partially: threaded filling only and releasing the filling as the same becomes fully threaded during the second pick after transfer.

- transfer but to release the filling as ,it becomes 5. An automatically threading loom shuttle having a side delivery eye, a threading block provided with a longitudinally extending thread passage therein, a thread guard extending-outwardly I and rearwardly over said thread passage, the rearward end of said thread guard being free, and a spring clamp tension device positioned immediately beneath the free end of said thread guard in position to engage and tension the par-.

tially threaded filling during the first pick after fully threaded during the second pick after transfer. g

'6. An automatically threading loom shuttle having aside delivery eye, a threading block pro-' vided with a longitudinally extending thread passage therein, a thread guard extending outwardly and rearwardly over said thread passage, the rearward end of said thread guard being free and being provided with a friction surface, and a spring pressed friction member engaging the partially threaded filling and pressing the same against said friction surface, said friction member being constructed to become free of engagement with the running filling as the latter passes down into saidside eye in becoming fully threaded.

7. An automatically threading loom shuttle having a side delivery eye, a threading block provided with a longitudinally'extending thread passage therein, a thread guard extending outwardly and rearwardly over said thread passage, the rearward end of said thread guard being free and being provided with a friction surface on the underneath side thereof, and a yielding friction member engaging the partially threaded filling and pressing the same against said frictionsurface only during the first pick after transfer, said shuttle being provided with a path leading from said thread passage to said side delivery eye for shuttle ing spaced away from the thread engaging surface of said friction member whereby the fully threadedfillingis free of engagement with said surface.

8. Ari-automatically threading loom shuttle having-a side delivery eye, a threading block pro P ly and rearwardly oversaid thread passage, the

rearwardend of said thread guard beingfree and being provided with a friction surface on the underneath side thereof, the runningfilling dur,-: ing the first pick after'transfer extendingthrough said'thr'ead passage and longitudinallyoutwardly of the shuttle beneath said thread'guard and passing "into said side delivery eye during the second pick after transfer, and a yieldingfric tion plate engaging the filling only during said first pick and pressing the same against said frictionsurface, said plate being positioned to be free of the filling when the latter passes through said delivery eye.

' 9.- An automatically threading loom shuttle having a side delivery eye, a threading block provided with a longitudinally extending thread passage therein, a thread guard extending outward-,

rearward end of said thread guard being free,

and a spring" clamp tension device comprising 7 lya'nd rearwardly over said thread 'passage,the

thread guard, said tension'device being open rearwardly to receive the filling as the latter becomes" 1 partially threaded and saidftension, device being open forwardly to permitthe filling to become freei thereof upon passing into side delivery eye.

I 10. An automatically threading loom shuttle vided'with a longitudinally extending thread passage therein, athread guard extending outwardly 1 having a side delivery eye, a threading block pro-' V and rearwardly' over said thread passage, the V rearward end of said thread guard being free and being provided on itsun'derneath side with a substantially horizontal friction surface, a horizontal friction plate positioned beneath said surface in position to engage the running filling when the latter extends longitudinally outwardly of the shuttle beneath saidjthread guard but to be free from engagement with the filling when the CARL D. BROWN;

same extends through said side delivery eye, and 7 means for yieldingly urging said plate upwardly 

